NASA’s Swift space telescope is running out of altitude, but a privately funded spacecraft is being readied to push it higher ...

NASA unveiled close-up pictures on Wednesday of the interstellar comet that’s making a quick one-and-done tour of the solar ...

American space science sits at a crossroads, with unmatched technical capability on one side and mounting political and ...

ESA confirmed that the 3I/ATLAS encounter was used as a planetary-defense rehearsal, conducted under the European Space ...

A new study of the red dwarf system TOI-3884 has uncovered rare, persistent spot-crossing signals that reveal unusually detailed information about the star’s magnetic activity and the planet’s orbital ...

A colossal star met an unexpected fate when it drifted too close to a supermassive black hole 10 billion light-years away.